Optomechanical fiber gyroscope

Onur Kilic; Onur Can Akkaya; Hyejun Ra; Michel Digonnet; Gordon Kino; Olav Solgaard

doi:10.1117/12.835141

5 October 2009 Optomechanical fiber gyroscope

Onur Kilic, Onur Can Akkaya, Hyejun Ra, Michel Digonnet, Gordon Kino, Olav Solgaard

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750345 (2009) https://doi.org/10.1117/12.835141
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

We report a miniature mechanical gyroscope that utilizes optical means to detect rotation-induced displacements in a mechanical structure. It utilizes the Foucault pendulum principle used in some existing MEMS gyroscopes: a rotating reference frame induces a Coriolis force that oscillates the structure about an axis orthogonal to the driving-mode axis. The main difference with similar MEMS gyroscopes is that this rotation-induced oscillation is sensed using a pair of high-finesse fiber Fabry-Perot displacement sensors instead of a capacitive device. The drive axis is also driven by radiation pressure inside a set of auxiliary fiber Fabry-Perot cavities, making this device immune to electromagnetic interference. Calculations predict that a rotation sensitivity on the order of 1°/h/Hz^1/2 is achievable. We show that this structure solves several problems associated with MEMS gyroscopes utilizing electrostatic sensing methods.

Citation Download Citation

Onur Kilic, Onur Can Akkaya, Hyejun Ra, Michel Digonnet, Gordon Kino, and Olav Solgaard "Optomechanical fiber gyroscope", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750345 (5 October 2009); https://doi.org/10.1117/12.835141

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